$ git clone -n https://src.fedoraproject.org/rpms/rust-glycin-utils.git /var/lib/mock/f42-build-side-1-3537135-46559/root/chroot_tmpdir/scmroot/rust-glycin-utils
Cloning into '/var/lib/mock/f42-build-side-1-3537135-46559/root/chroot_tmpdir/scmroot/rust-glycin-utils'...
$ git fetch origin a7dc5eb126059f1c23c89e61dcfa934f8f03cdea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glycin-utils
 * [new ref]         a7dc5eb126059f1c23c89e61dcfa934f8f03cdea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7dc5eb Update to version 3.0.1; Fixes RHBZ#2359074