$ git clone -n https://src.fedoraproject.org/forks/imbearchild/rpms/golang-github-bugsnag-panicwrap.git /var/lib/mock/f41-build-1012811-17799/root/chroot_tmpdir/scmroot/golang-github-bugsnag-panicwrap
Cloning into '/var/lib/mock/f41-build-1012811-17799/root/chroot_tmpdir/scmroot/golang-github-bugsnag-panicwrap'...
$ git fetch origin 90aef3cc85212a31936532f2f7b2c20db581d00e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/imbearchild/rpms/golang-github-bugsnag-panicwrap
 * [new ref]         90aef3cc85212a31936532f2f7b2c20db581d00e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90aef3c Fix build on riscv64