$ git clone -n https://src.fedoraproject.org/rpms/R-oskeyring.git /var/lib/mock/f45-build-6295-347/root/chroot_tmpdir/scmroot/R-oskeyring
Cloning into '/var/lib/mock/f45-build-6295-347/root/chroot_tmpdir/scmroot/R-oskeyring'...
$ git fetch origin 3c4d44668d8ffa6a15d2c549a3ae9d2df7082332:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-oskeyring
 * [new ref]         3c4d44668d8ffa6a15d2c549a3ae9d2df7082332 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c4d446 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild