$ git clone -n https://src.fedoraproject.org/rpms/alpine.git /var/lib/mock/f42-build-side-1-3568039-46743/root/chroot_tmpdir/scmroot/alpine
Cloning into '/var/lib/mock/f42-build-side-1-3568039-46743/root/chroot_tmpdir/scmroot/alpine'...
$ git fetch origin 399a2d8e9a2a47b0047feb8e7717b72087c25e41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alpine
 * [new ref]         399a2d8e9a2a47b0047feb8e7717b72087c25e41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 399a2d8 Add explicit BR: libxcrypt-devel