$ git clone -n https://src.fedoraproject.org/rpms/rust-ignore.git /var/lib/mock/f45-build-42510-794/root/chroot_tmpdir/scmroot/rust-ignore
Cloning into '/var/lib/mock/f45-build-42510-794/root/chroot_tmpdir/scmroot/rust-ignore'...
$ git fetch origin 27080415b81496dc75f3d67ad419f4ae51b4f9a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ignore
 * [new ref]         27080415b81496dc75f3d67ad419f4ae51b4f9a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2708041 Update to version 0.4.33; Fixes RHBZ#2510615